How to set video encode bitrate?

[KTOC]

Hello,

I tried to reduce the video record file size (without losing quality) but not successful. My goal is to record 720p 25fps video. The current video size is 100mb for 5 minutes record, which is large for upload. I tried to change the code in MediaVideoEncoder.java in librestreaming/encoder as follow:

final MediaFormat format = MediaFormat.createVideoFormat(MIME_TYPE, mWidth, mHeight);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT,MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);    // API >= 18
format.setInteger(MediaFormat.KEY_BIT_RATE, 300000); <—- HERE
format.setInteger(MediaFormat.KEY_FRAME_RATE, FRAME_RATE);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 6);

After changing the bitrate, the video size is still remain (around 100mb for 5minute at 720p).

Is this correct way to do or I have to set somewhere else?